Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts receivable	$ 0	$ 0	$ 0
Bad debt expense		0
Inventory raw materials	150,000	150,000	150,000
Inventory finished goods	75,000	$ 75,000	$ 86,000
Gimoti [Member]
Significant Accounting Policies [Line Items]
Purchase by third party for research purposes	$ 683,000